Value really can be from one extreme to the other.
go crazy at a Hampton by the airport or go big in a city

I used mine back in 2012 as always wanted to go to Venice so paid for one night in milan and voucher for Venice, upgraded to something rather special as HH blue back then I felt like James Bond with room service and the view from the living area/lounge. Cost of basic 200 euros, room given was a king tower suite worth over 2000 for my night. Didn't even use the exec lounge as I was new to the HH game.

you really can use this anywhere you want. Edinburgh W/A? The Conrad or bankside london?

(Can see the above posters point about Dublin Conrad, stayed twice but personally I was just happy to be on hols)

or a quick weekend away in europe. Safe travels where you decide to burn it ^